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Ink and power arrangement for modular inkjet printhead

Active Publication Date: 2021-03-18
MEMJET TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The print module described in this patent allows for efficient power and data delivery to multiple rows of print chips on an ink manifold. This is achieved without the need for complex wiring and substrates. The technical effect is improved performance and reliability in printing.

Problems solved by technology

One disadvantage of using an array of monochrome print bars is that the overall print zone for full color printing is relative long.
Longer print zones create challenges, not only in terms of alignment and accurate dot-on-dot placement, but also integration into an existing offset media feed system.
For example, limited space may be available for an inkjet print engine in the media feed path and reconfiguring media feed systems to accommodate such a print engine is costly for OEMs.
However, a problem with such printers is that each color channel has no redundancy, which inevitably impacts on speed and / or print quality.
Accordingly, printers of this type are not usually suitable for use in digital ink presses.

Method used

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  • Ink and power arrangement for modular inkjet printhead
  • Ink and power arrangement for modular inkjet printhead
  • Ink and power arrangement for modular inkjet printhead

Examples

Experimental program
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first embodiment

[0077]Referring to FIGS. 1 and 2, there is shown a modular inkjet printhead 1 (or “print bar”) according to a first embodiment of the invention. The printhead 1 comprises a plurality of printhead modules 3 arranged end on end and mounted to a complementary support structure 5. Typically, the support structure 5 has one or more openings configured for complementarily receiving the printhead modules 3. Although three printhead modules 3 are shown in the embodiment of FIGS. 1 and 2, it will be appreciated that the printhead 1 may contain a greater or fewer number of printhead modules (e.g. 1 to 20 printhead modules) in order to construct a pagewide print bar of any required length.

[0078]FIGS. 3 to 7 show an individual printhead module 3 according to the first embodiment. Each printhead module 3 comprises a substrate 7 in the form an elongate ink manifold having four parallel ink supply channels 9 extending longitudinally along a length thereof. The ink supply channels 9 are defined in ...

second embodiment

[0090]Referring to FIGS. 13 and 14, there is shown a modular inkjet printhead 100 (or “print bar”) according to a second embodiment of the invention. Where relevant, like features in the first and second embodiments are identified with like reference numerals.

[0091]The printhead 100 according to the second embodiment comprises four printhead modules 103 arranged end on end and mounted on a complementary support structure, which takes the form a U-channel 105. The U-channel has a base 106 having one or more openings configured for complementarily receiving the printhead modules 103 and, as described above, the number of printhead modules may be varied in order to construct a pagewide array of any required length.

[0092]In contrast with the printhead 1 according to the first embodiment, the printhead 100 according to the second embodiment is supplied with ink from an elongate ink carrier 101, which take the form of a beam member extending alongside the line of printhead modules 103 and...

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PUM

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Abstract

A modular inkjet printhead includes: a plurality of printhead modules arranged end on end in a row; an elongate support structure extending a length of the printhead for holding the printhead modules; and an ink carrier extending alongside the support structure and laterally spaced from the printhead modules, the ink carrier being fluidically connected to each of the printhead modules via a plurality of ink connectors extending laterally therefrom; and a pair of elongate busbars extending longitudinally along a roof of the ink carrier, each busbar being electrically connected to each of the printhead modules via a pair of respective connector straps extending transversely therefrom, the busbars supplying power to each of the printhead modules.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application claims the benefit of priority to U.S. Provisional Application No. 62 / 900,356 filed Sep. 13, 2019 and to U.S. Provisional Application No. 63 / 023,370 filed May 12, 2020, the contents of which are incorporated herein by reference for all purposes.FIELD OF THE INVENTION[0002]This invention relates to an inkjet printhead. It has been developed primarily to provide a robust, full-color modular printhead suitable for high quality pagewide printing.BACKGROUND OF THE INVENTION[0003]The Applicant has developed a range of Memjet® inkjet printers as described in, for example, WO2011 / 143700, WO2011 / 143699 and WO2009 / 089567, the contents of which are herein incorporated by reference. Memjet® printers employ one or more stationary inkjet printheads in combination with a feed mechanism which feeds print media past the printhead in a single pass. Memjet® printers therefore provide much higher printing speeds than conventional scan...

Claims

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Application Information

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IPC IPC(8): B41J2/14B41J2/175B41J2/21
CPCB41J2/14B41J2/175B41J2202/20B41J2002/14491B41J2202/13B41J2/2103B41J2202/19B41J2/155B41J2/14209B41J2/145B41J2/1433B41J2/17
Inventor THELANDER, JASON MARKBURKE, DAVID OLIVER
Owner MEMJET TECH LTD
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